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  • Jonathan Taylor

    Member
    January 30, 2022 at 10:00 am
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    Hi Corey,

    I remember you commenting on the high CEC value on the area where lime had been applied. I have a theory about this that I posted in another thread. Today I read this in the Ideal Soil book:

    “If the soil pH is above 7.0, the soil probably contains free, undissolved Calcium
    and/or Magnesium carbonates, and both the AA 7.0 test and the Mehlich 3 test
    are likely to dissolve them and give too high a reading for Ca and Mg, leading to
    an overestimate of CEC.”

    Which agrees with my theory.

    By the way this book is available on line as a free PDF download. You’ll need to search a bit for it.